Apparatus for separating liquids of different gravity



Jan. 3, 1928.

W. LINNMANN, JR APPARATUS FOR SEPARATING LIQUIDS OF DIFFERENT GRAVITY 2 Sheets-Shook 1 Filed No v.

Jan- 3, 1928.

. W. LINNMANN, JR

APPARATUS FOR ssumwms LIQUIDS OF DIFFERENT GRAVITY F1 ed Nov. 22', 1926 sets-Sheet 2 parts shown in Figs. 2 and3 and showing modi- Patented Jan. 3, 1928.

UNITED STATES WILHELM LIN N MAN N, JR., OF ESSEN-ALTENESSEN,

APPARATUS EDR SEPABATING LIQUIDS OF DIFFERENT GRAVITY.

Application filed November 22, 1926, Serial No. 149,850, and in Germany June 8, 1926.

My invention relates to improvements in apparatus for separating liquids ofdifferent gravity, such for example as waste-water and benzol, and more particularly in apparatus having an inlet to the separating tank and an outlet therefrom, and provided with means for automatically closing the outlet when a certain amount of benzol has been collected therein. The object of the improvements "is to provide an apparatus of this class which is simple in construction and reliable in operation, and with this object in view my invention consists in providing the delivery pipe from the tank at its inlet with a portion opening into a vertical tubular member located within the tank and covered at its top by a cap or hood located with its bottom part below the top part of said tubular member and adapted to be closed by the benzol rising within the tank and to close' the outlet by the pressure produced therein.

For thepurpose of explaining the invention several examples embodying the same have been shown'in the accompanying drawings in which the same letters of reference have been used in all the views to indicate corresponding parts. In said drawings,

ig. 1 is a sectional elevation tank, Y Fig. 2 is a detail sectional elevation showing the delivery pipe and the means for controlling the flow of 'the liquid therefrom, the being shown in the position in which the heavy liquid'such as water is being delivered from the tank,

Fig. 3 is a similar detail sectional elevation showing the parts in the position in showing the Figs. 4 to 8 are elevations similar to those which the deliverypipe has been closed, and

ficatiohs of the apparatus.

In describing the invention reference will be made to an apparatus for separating benzol from waste-water. But I wish it to be understoodthat my invention is not limited to such use.

In the example shown in Figs. 1 to3, my improved apparatus comprises a tank u having an inlet 6 and a delivery pipe 0 for waste-water, the delivery pipe being bent to provide a water seal and'having. its top art directed upwardly and providing a seat for a float valve 7 provided witha packing ring g. The tank a is provided with a vertica partition wall '0 extending from the top to a point away from the bottom thereof and formed in its upper part with an opening 12. By the said partition wall the tank a is divided into two sections 9 and r, the section 9 receiving the water from the inlet pipe I), and the section r enclosing the inlet end of the delivery pipe 0 and the means for controlling the discharge of the water from the tank.

The inlet end of the pipe .0 andthe float valve f are surrounded by a vertical tubular member 03 open at its top and bottom and covered at its top by a cap or hood 6 the bottom part of which is located below the top part of the pipe 01 and at a higher level than the top part of the pipe 0.

In the operation of the apparatus waste- -water containing benzol is admitted through the pipe 6 and into the chamber 9- in which the benzol is separated from the water and by reason of its lower specific gravity rises to the top of the water. Thus only water is collected within the chamber 7*. As the water rises within the tank, the bottom part of the tubular member 03 is first closed, and thereafter the water rises so far that it flows through. the opening 12 into the top part of the chamber 1 Thus only water rises within the tubular member d, while the benzol collected on the surface of the water flows also into the upper part of the chamber r. At the beginning of the operation there will be hardly any benzol on-the surface of the water, so that at the beginning the liquid isas has been indicated v Gradually the layer of benzol on inside the same, as has been indicated in Fig. 3 inwhich thewater has been indicated by comparatively wide lines, While the benzol has been indicated by narrow lines. Thus the cap 0 will gradually be closed at its bottom, so that the air is confined below the same. Thereby the pressure of the air below the hood e will rise and prevent the unseating of the float valve f, whereupon thev discharge of water from the tank is interrupted.

Themodification shown in Fig. 4 issimilar to the, one shown in Figs. 1 to 3, and the same letters of reference have been used to indicate corresponding parts. However the tubular member h surrounding the float valve-f and the inlet end of the pipe is constructed in a slightly different way, the, said member being in the form of a pipe only at its top part, and secured to the side wall of the tank with its bottom part. The operation of the apparatus is the same as has been described with reference to Fig. 1.

In the modification shown in Fig. the. float f is provided with a hollow extension 6 projecting downwardly and into the pipe 0. Thereby the float valve is more readily raised from its seat. If after slightly lifting the float the water flows into the pipe 0 which by a cap-sha so farwas only partly filled, the buoyancy of the float is increased. Otherwise the con- .struction is the same as that described with reference to Figs. 1 to 3, and the same let- .ters of reference have been used to indicate corresponding parts.

In Fig. 6 I have shown a modification in. which the delivery pipe 0 is enlarged at its top into the form of a cup receiving the float f. The float is elevated when the waste-water flows above the upper margin of the said cup. When however the benzol rises to the lower margin of thehood e, and

the water rises within the tubular member h, p

said outlet, and a float valve on said outlet.

the air containedtherein is compressed, and the level within the tubular member is lowered'so far that the water does not flow any more into the cup is. To assist the rising of the float I prefer to provide the hood with a' tubular member m projecting downwardly therefrom into the annular space provided between the 'float f and the wall of the cup "is. a

n the modification shown in Fig. 7 the t isannular in form, and it carries a disk 8 adapted to close the pipe 0.

In F ig. 8 amodification is shown in which an annular float u is provided, which is located outside the tubular member h. In addition the valve member is in the form of afloat 'v connected with the annular float u 6. member w. j While in escribing the invention referonce has been made to particular examples embodyingthe same I wish itto be under-- stoodthat my invention'is not limited to the constructions shown in the rawings, and that various changes may made in. the gheneral arrangement of the apparatus and t e construction of its parts without departing from the invention. For example the float valve f may be omitted, in which case the discharge of, the water is interrupted bythe level of the water falling below the top of the pipe 0.

I claim:

' sage extending 1. An apparatus for separating liquidslof different specific tank having an inlet, a container closed at its top and communicating with said tank near its bottom, and an outlet projecting into said container, said container communicating at its top with said tank through a pasinto said tank downwardly and to a point above the level of the inlet end of said outlet.

, 2.v Apparatus for separating liquids of different specific gravities, comprising a t having an inlet and an outlet,'a container within said tank open atits top and communicating with, the tank near the bottom gravities, comprising a as ank75.

thereof, said outlet comprising a pipe projecting into said container to a point below the top thereof, and ahood covering the top of said container and having its bottom part located below the top part of said container and above the level of the inlet end of said pipe. v

3. An apparatus for separating liquids of different specific gravities, comprising a tank having an inlet, a container closed at its top and communicating with saidtank near its bottom, an outlet projecting into said container, said container communicating at its top with said tank through a assage extending into I oint above the level of the inlet end of 4. An apparatus for separating liquids of different specific gravities, comprising a tank having an inlet, a container closed at its top and-cdmmunicating with said tank near its bottom, an outletprojecting into said con-' tainer, said container communicating at its top with said tank through a passage extending into said tank downwardly and to a po nt above the {level of the inlet end of. a float valve on said outlet;

said 'outlet, and said outlet being formed at its inlet end with a cup receiving-said float valve.

5. An apparatus for separating liquids of different specific gravities, comprising a tank having an inlet and an outlet, a tubular member within said tank open at its topand communicating with the tank near the .bOt-

said tank downwar y and to a y member and hood from "the inlet side of said $111k and formed at its upper part with a o e.

In testimony signature. V

' WILHELM LINN'MANN, JR.

whereof I hereunto 

